4-14
F-669-0113 Edition
MAINTENANCE AND LUBRICATION
Figure 4-7: Checking Axle for Bend
Alignment
Wheel Alignment
DANGER
When trailer tires show signs of scuffing, feather-edging
or uneven wear, examine the trailer for damaged
suspension (frame, shocks, linkage, etc.), axle, wheel
bearings and wheels. Proper wheel alignment and wheel
bearing adjustment is essential for proper tire wear. The
simplest form of checking wheel alignment “toe” is by
running the trailer over a “SCUFF GAUGE”. A scuff
gauge reading of 16 feet or less per mile is considered
satisfactory. If a scuff gauge is not readily available, or
edge wear on one side of a tire is occurring signifying
positive or negative camber, alignment can be checked
as follows:
1.
Remove wheel, hub and bearing assemblies.
2.
Place a 3-point axle gauge against the front side of
the axle, and adjust each axle gauge point to the
axle. (Double point end against the inner and outer
wheel bearing surfaces of the spindle being checked
and the other point on the inner bearing surface on
the other spindle.)
3.
Move the axle gauge and place against the back
side of the axle. If either of the points of double point
end fails to touch the axle surface, a bent spindle is
evident. A point gap of .015" or more is considered
excessive tire “toe” and the axle must be replaced
4.
Follow the same procedures as in
except place the axle gauge above and below the
axle. If gauge point gap is found, the axle has
positive or negative camber. The trailer axle has no
camber from the factory. If it is found to have positive
or negative camber, axle replacement is necessary
(See Figure 4-8
for examples of camber).
To prevent a life threatening accident:
1.
Support trailer and undercarriage so tires are
off the ground.
2.
Support the trailer and undercarriage on jack
stands with sufficient capacity to support the
total weight of the trailer and any load which
it may be carrying.
Summary of Contents for 855C HD Series
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Page 48: ...4 20 F 669 0113 Edition MAINTENANCE AND LUBRICATION Figure 4 12 Axle and Brake Assembly...
Page 65: ...TROUBLESHOOTING GUIDE 5 9 Notes...
Page 66: ...5 10 F 669 0113 Edition TROUBLESHOOTING GUIDE...
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